Codebases sized to fit one context window dramatically improve agent outcomes
julianharris · x · 2026-10-26
julianharris argues agents fail as codebases grow because bits fall out of the context window, and speculates future codebases will be optimized to fit entirely within a single context window — a change he says made a dramatic difference in a recent project. He also showcases Unix Jelly (boxabirds/unixjelly, GPL-3.0, ported from Scott Sun's Jelly Baby): five beginner-friendly guided missions (shell, permissions/pipes, git, web, security) with a sandboxed in-browser terminal, no installs, progress saved locally.
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